STM32F407高级定时TIM1,CH1 CH2 CH3无法输出PWM，CH4正常

Bgphone001 · 发表于 2021-11-26 15:08:18

STM32F407 采用高级定时器TIM1输出四路PWM,CH4能正常输出，CH1,CH2,CH3没有输出，同时还用到了串口1、2、3、4、5。哪位遇到过这个问题啊，我试了好多办法都不行。
谢谢大家了！！！

void TIM1_PWM_Init(u32 arr,u32 psc)
{
  GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);       //TIM1时钟使能
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);  //使能PORTF时钟

GPIO_PinAFConfig(GPIOE,GPIO_PinSource9,GPIO_AF_TIM1);  //GPIOE9复用为定时器1
GPIO_PinAFConfig(GPIOE,GPIO_PinSource11,GPIO_AF_TIM1); //GPIOE11复用为定时器1
GPIO_PinAFConfig(GPIOE,GPIO_PinSource13,GPIO_AF_TIM1); //GPIOE13复用为定时器1
GPIO_PinAFConfig(GPIOE,GPIO_PinSource14,GPIO_AF_TIM1); //GPIOE14复用为定时器1

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13|GPIO_Pin_14;          //GPIOE 9 11 13 14
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;       //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;    //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;       //上拉
GPIO_Init(GPIOE,&GPIO_InitStructure);             //初始化PE9

TIM_TimeBaseStructure.TIM_Prescaler=psc;  //定时器分频
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseStructure.TIM_Period=arr; //自动重装载值
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;//重复寄存器，用于自动更新PWM占空比
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);//初始化定时器1

//初始化TIM14 Channel1 PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性低
TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset;

TIM_OC1Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 OC1
TIM_OC2Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 OC2
TIM_OC3Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 OC3
TIM_OC4Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 OC4

TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);  //使能TIM1在CCR1上的预装载寄存器
  TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(TIM1,ENABLE);//ARPE使能
// TIM1->CR2&=0X0000;
//// TIM1->BDTR=1<<15; //主输出使能
//// TIM1->BDTR=1<<14;//MOE

TIM_Cmd(TIM1, ENABLE);  //使能TIM14
TIM_CtrlPWMOutputs(TIM1,ENABLE);
}